FU(w/o STI)-18
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
3. Intake Manifold
A: REMOVAL
1) Remove the collector cover.
(1) Remove the clips (A).
(2) Hold the shaded area (B) by hand and carefully pull the RH side (C) upward.
(3) Hold the shaded area (D) by hand and carefully pull the LH side (E) upward.
2) Release the fuel pressure. <Ref. to FU(w/o STI)-146, RELEASING OF FUEL PRESSURE, PROCE-
DURE, Fuel.>
3) Disconnect the ground terminal from battery sensor. <Ref. to NT-5, BATTERY, NOTE, Note.>
4) Open the fuel filler lid and remove the fuel filler cap.
NOTE:
This operation is required to release the inner pressure of the fuel tank.
5) Lift up the vehicle.
6) Remove the under cover. <Ref. to EI-21, REMOVAL, Front Under Cover.>
7) Drain approximately 3.0 L (3.2 US qt, 2.6 Imp qt) of coolant. <Ref. to CO(w/o STI)-13, DRAINING OF EN-
GINE COOLANT, REPLACEMENT, Engine Coolant.>
8) Remove the intercooler. <Ref. to IN(w/o STI)-38, REMOVAL, Intercooler.>
9) Remove the intake duct No. 2. <Ref. to IN(w/o STI)-25, INTAKE DUCT NO. 2, REMOVAL, Intake Duct.>
10) Remove the intake duct No. 3. <Ref. to IN(w/o STI)-28, INTAKE DUCT NO. 3, REMOVAL, Intake Duct.>
EX-03204
(A)
(B)
(C)
(E)
(D)
15WRX_STI_US_EN.book 18 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-19
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
11) Disconnect the PCV hose from the PCV valve.
12) Disconnect the connector (A) from the throttle body, and disconnect the preheater hose (B) from the
throttle body.
EC-03211
FU-08479
(B)
(A)
15WRX_STI_US_EN.book 19 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-20
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
13) Remove the clip, and disconnect the brake booster vacuum hose from the intake manifold.
14) Remove the clips securing the PCV pipe and generator cord to the intake manifold.
FU-08315
FU-08316
15WRX_STI_US_EN.book 20 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-21
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
15) Disconnect the vacuum control hose and vacuum hose from the vacuum pipe assembly.
16) Disconnect two vacuum hoses from the canister pipe.
FU-07745
FU-07746
15WRX_STI_US_EN.book 21 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-22
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
17) Disconnect the connector from the purge control solenoid valve.
18) Disconnect the connector from the manifold absolute pressure and intake air temperature sensor.
19) Disconnect the connector (A) from the tumble generator valve RH.
FU-07747
FU-07748
15WRX_STI_US_EN.book 22 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-23
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
20) Disconnect the connector (B) from the tumble generator valve LH, and remove the bolt securing the fuel
pipe protector to the intake manifold.
21) Remove the engine harness clip from the intake manifold.
FU-08317
(A)
(B)
LHRH
FU-08318
15WRX_STI_US_EN.book 23 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-24
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
22) Remove the bolt securing the EGR pipe to the EGR valve.
FU-07751
15WRX_STI_US_EN.book 24 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-25
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
23) Disconnect the fuel delivery tube and evaporation hose.
CAUTION:
• Be careful not to spill fuel.
• Catch the fuel from the tubes using a container or cloth.
(1) Disconnect the quick connector on the fuel delivery tube from the fuel pipe assembly, and remove the
clip (A) securing the fuel delivery tube.
NOTE:
Disconnect the quick connector as shown in the figure.
(a) Slider
FU-07796
(a)
(a)
FU-08319
(A)
15WRX_STI_US_EN.book 25 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-26
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
(2) Disconnect the evaporation hose from the fuel pipe assembly.
24) Remove the bolts securing the fuel pipe assembly to the intake manifold.
FU-07753
FU-07754
15WRX_STI_US_EN.book 26 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-27
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
25) Disconnect the fuel delivery pipe (A) and vacuum hose (B), and remove the fuel pipe assembly.
CAUTION:
• Be careful not to spill fuel.
• Catch the fuel from the pipes using a container or cloth.
NOTE:
Disconnect the quick connector as shown in the figure.
(a) Slider
FU-06059
(a)
(a)
FU-07360
(B)
(A)
15WRX_STI_US_EN.book 27 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-28
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
26) Remove the intake manifold from the air intake adapter together with the tumble generator valve assem-
bly.
27) Remove the vacuum hose assembly from the water pipe assembly.
FU-08320
FU-07756
15WRX_STI_US_EN.book 28 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-29
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
B: INSTALLATION
1) Install the vacuum hose assembly to the water pipe assembly.
Tightening torque:
6.4 N·m (0.7 kgf-m, 4.7 ft-lb)
2) Install the intake manifold and tumble generator valve assembly to the air intake adapter.
NOTE:
Use a new gasket.
Tightening torque:
25 N·m (2.5 kgf-m, 18.4 ft-lb)
FU-07756
FU-08320
15WRX_STI_US_EN.book 29 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-30
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
3) Connect the fuel delivery pipe (A) and vacuum hose (B) to the fuel pipe assembly.
CAUTION:
• Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface
of the pipe.
• When connecting the quick connector, make sure to insert it all the way in before locking the slider.
• When it is difficult to lock the slider, check that the connector is fully inserted.
• After locking the slider, check again that the quick connector is securely connected.
NOTE:
Connect the quick connector as shown in the figure.
(a) Slider
FU-06060
(a)
(a)
FU-07360
(B)
(A)
15WRX_STI_US_EN.book 30 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-31
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
4) Install the fuel pipe assembly to the intake manifold.
Tightening torque:
6.4 N·m (0.7 kgf-m, 4.7 ft-lb)
5) Connect the fuel delivery tube and evaporation hose.
(1) Connect the evaporation hose to fuel pipe assembly.
FU-07754
FU-07753
15WRX_STI_US_EN.book 31 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-32
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
(2) Connect the connector on the fuel delivery tube to the fuel pipe assembly, and secure the fuel delivery
tube using clip (A).
CAUTION:
• Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface
of the pipe.
• When connecting the quick connector, make sure to insert it all the way in before locking the slider.
• When it is difficult to lock the slider, check that the connector is fully inserted.
• After locking the slider, check again that the quick connector is securely connected.
NOTE:
Connect the quick connector as shown in the figure.
6) Install the EGR pipe. <Ref. to EC(w/o STI)-33, INSTALLATION, EGR Pipe.>
(a) Slider
FU-07797
(a)
(a)
(a)
FU-08319
(A)
15WRX_STI_US_EN.book 32 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-33
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
7) Secure the engine harness to the intake manifold using clip.
8) Connect the connector (A) to the tumble generator valve RH.
9) Connect the connector (B) to the tumble generator valve LH, and secure the fuel pipe protector to the in-
take manifold.
Tightening torque:
19 N·m (1.9 kgf-m, 14.0 ft-lb)
FU-08318
FU-08317
(A)
(B)
LHRH
15WRX_STI_US_EN.book 33 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-34
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
10) Connect connectors to the manifold absolute pressure & intake air temperature sensor.
11) Connect the connector to the purge control solenoid valve.
FU-07748
FU-07747
15WRX_STI_US_EN.book 34 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-35
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
12) Connect the vacuum hose to the canister pipe.
13) Connect the vacuum control hose and vacuum hose to the vacuum pipe assembly.
FU-07746
FU-07745
15WRX_STI_US_EN.book 35 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-36
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
14) Secure the PCV pipe and generator cord to the intake manifold using the clip.
15) Connect the brake booster vacuum hose to the intake manifold.
NOTE:
Install the clip to the position of alignment mark of intake manifold.
FU-08316
FU-08315
15WRX_STI_US_EN.book 36 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-37
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
16) Connect the preheater hose (B) to the throttle body, and connect the connector (A) to the throttle body.
17) Connect the PCV hose to the PCV valve.
18) Install the intake duct No. 3. <Ref. to IN(w/o STI)-34, INTAKE DUCT NO. 3, INSTALLATION, Intake
Duct.>
19) Install the intake duct No. 2. <Ref. to IN(w/o STI)-32, INTAKE DUCT NO. 2, INSTALLATION, Intake
Duct.>
20) Install the intercooler. <Ref. to IN(w/o STI)-41, INSTALLATION, Intercooler.>
21) Fill engine coolant. <Ref. to CO(w/o STI)-14, FILLING OF ENGINE COOLANT, REPLACEMENT, En-
gine Coolant.>
22) Install the under cover. <Ref. to EI-22, INSTALLATION, Front Under Cover.>
23) Lower the vehicle.
24) Connect the ground terminal to battery sensor. <Ref. to NT-5, BATTERY, NOTE, Note.>
25) Install the collector cover.
FU-08479
(B)
(A)
EC-03211
15WRX_STI_US_EN.book 37 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-38
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
C: DISASSEMBLY
1) Remove the manifold absolute pressure & intake air temperature sensor from the intake manifold.
2) Remove the EGR pipe from intake manifold.
FU-07263
FU-07264
15WRX_STI_US_EN.book 38 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-39
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
3) Remove the throttle body from the intake manifold.
4) Disconnect the vacuum hose from the intake manifold, and remove the purge control solenoid valve.
FU-07265
FU-07266
15WRX_STI_US_EN.book 39 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-40
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
5) Disconnect the PCV hose and vacuum control hose from the intake manifold.
D: ASSEMBLY
1) Connect the PCV hose and vacuum control hose to intake manifold.
FU-07267
FU-07267
15WRX_STI_US_EN.book 40 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-41
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
2) Connect the vacuum hose to the intake manifold, and install the purge control solenoid valve.
Tightening torque:
19 N·m (1.9 kgf-m, 14.0 ft-lb)
3) Install the throttle body to the intake manifold.
NOTE:
Use a new gasket.
Tightening torque:
8 N·m (0.8 kgf-m, 5.9 ft-lb)
FU-07266
FU-07265
15WRX_STI_US_EN.book 41 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
FU(w/o STI)-42
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
4) Temporarily install the EGR pipe to the intake manifold.
NOTE:
• Use new O-rings.
• Tighten the EGR pipe when installing the intake manifold. <Ref. to EC(w/o STI)-33, INSTALLATION, EGR
Pipe.>
5) Install the manifold absolute pressure & intake air temperature sensor to the intake manifold.
NOTE:
Use new O-rings.
Tightening torque:
3.5 N·m (0.3 kgf-m, 2.5 ft-lb)
E: INSPECTION
1) Check that the intake manifold and fuel pipe have no deformation, cracks and other damages.
2) Check that the hose has no cracks, damage or loose part.
FU-07264
FU-07263
15WRX_STI_US_EN.book 42 ページ ２０１５年２月１３日 金曜日 午前１１時２０分
